Vacuum container



FIG. 1 is a front elevation view of a vacuum container showing my new design;

FIG. 2 is a side elevation view thereof;

FIG. 3 is a rear elevation view thereof; and,

FIG. 4 is a top plan view thereof.

The bottom view of the vacuum container forms no part of the claimed design. 

The ornamental design for a vacuum container, as shown and described. 